A 2 year old child does not know how to cough
out the phlegm.
In whezzing the primary problem is broncho spasm or narrowing of bronchi.Once the spasm is relieved phlegm or secretions will come out automatically.
Usually the child swallows the phlegm and vomits it or passes a little in the stool.
When the disease is settling the secretions become less.
You need not do any thing except giving medicines,nebulisation and steam inhalation carefully.